Lever-moving mechanism for looms



Aug. 18, 1925..

w. M. wATTlE LEVER MOVING MECHANISM FOR LOOMS Filed Dec.I 27, 1923 INVENTOR wm. m. WATHE ATTORNEY Patented Aug. 18, 1925.,

N NUNITED STATES iATEmN oEElcE.

WILLIAM M. WATTIE', 0F WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM W'O'RKS, OF WORCESTER, MASSACHUSETTS-1,21 CORPORATION OF MASSACHUSETTS.

'pLEVER-MO'TING MECHANISM FOR LOOMS.

Application filed `December 27, 1923. Serial N'o. 683,076'.

To all 'whom t may concern.'

Be it known that I, WILLIAM M. VVATTIE, a citizen of theDominion of Canada, residing at lVorcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Lever-Moving Mechanism for Looms, of which thev following is a specification.

This invention relates to improvements in pattern mechanism for looms, such as the well known Knowles head, and more par; ticularly to the construction of the vibrator gear and vibrator connector.

As ordinarily constructed the Knowles head comprises a pair of constantly'rotating cylinder gears and a vibrator gear which is rotatably mounted on la pattern chain controlled lever which is either raised o'r lowered to place the vibrator gear in operative Y or the other of the cylinders the connector will move in or out to lower or raise the associated harness. The vibrator connector as ordinarily constructed is provided with a neck the lower portion of which is' required to clear the bearing for the vibrator gear while the upper part of the neck is necessarily at all times slightly below the upper cylinder so as not to be engaged thereby. These limitations require the connector to be made with a comparatively small neck which has been found to lack sufficient strength when applied to the weaving of heavy cloth.

1t is the principal object of my invention to provide a vibrator gear and harness connector construction whereby the connector will be lowered as it passes' over the pivot of the gear thus permitting more stock to be applied yto the upper part of the connector while at the same time maintaining the proper clearance with the upper cylinder.

A further object of my invention is so to modify the motion of the harness frames as to permit the warps to pass each other at a lower rate of speed than has obtained heretofore in this type of harness motion.

With these and other objects in View, which will appear as the description proi nector in a different position,

Fig. 3 is an enlarged view of the gear and associated parts as seen in Fig. 1,

Fig. 4L is an enlarged rear elevation of the gear andthe link forming the subject matterl of my invention, and

Fig. 5 is a vertical section taken on line 5-5 of Fig. 4. Y

Referring to the drawings, the loom side 10 supports the arches 11 to which is secured the head frame 12 having the usual chain run 13. Upper and lower cylinders 14: and 15, respectively, are mounted in fixed bearings in the frame and when the loom is in normal operation are given a uniform rotation in Vopposite directions by driving mechaL nism (not shown); The pin 16 is mounted in the frame and gives bearing to the vibrator levers, one of which, 17, is indicated in the drawings. The chain cylinder is mounted in bearings 18 which are adjustably held in the head frame. The jacks, indicated at 19, are pivoted on pin 2O and have a pivotal connection with the vibrator connector 21 as at 22. The drop weights 28 and their spring plungers 24; serve to hold the vibrator connectors down. These and other parts of the head shown in the drawings are of the usual construction and may be made in any approved manner.

The vibrator gear is pivoted to the lever 17 as at 31 which is provided with a boss 32 the center of which is offset from the center of rotation of the gear 30, preferably being below the center of rotation. Pivot ally mounted on this boss 32 is a link 38 to the upper end of which is pivotally connected the vibrator connector 21. A stud 85 forming the pivotal connection between the link 33 and the connector 21 extends into a slot 34 formed in gear 30 and has both sides thereof in contact with the straight walls of the slot.

Referring to Fig. l it will be seen that stud 35 is in substantially the same position that it would occupy if the gear connectors were made as usual and this would also be true when the. gearing is given half a rotation so as to cause stud 35 to lie on the left hand side of the center of the gearing. Ilowever, as the stud 35 moves upwardly from the position shown in Fig. l to the left it will be drawn toward the center of the gear 30 because of the fact that the link is pivoted at a point below the center of the gear and that as it approaches the end of the stroke to the left of the center it will recede from the pivotal center of the gear so as to occupy a position that will insure a` sutieient throw of the harness jacks. Because of this construction the neck 36 of the vibrator will not be raised quite as high as would be the case if the connector were pivoted directly to the gear and for that reason itis possible to make the neck of the connector broader and therefore stronger. It will be further observed that as the stud 35 approaches the center of its throw the jacks are caused to move a little slower than a true crank motion. For this reason when the warps are passing each other they move slower than is the case when the usual Knowles head is employed, with the result that there is less tendency to snap the warp ends.

It is apparent from the construction set forth herein that as the vibrator connector is moved from one extreme position to the other it is made to approach the center of the gear during a portion of the stroke to lower the connector and that thereafter the connector is caused to recede from the center of the gear to insure suiicient throw of the harnesses.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art and I do not wish to be limited to the specific structure illustrated, but what I claim is:

1 In a pattern mechanism for looms, harness mechanism, a pattern controlled lever, a rotatable member mounted on said lever, a pair of pivotally connected links, one of said links connected to the harness mechanism and thevother of said links. pivotally mounted on said lever eccentrically with respect to said member and having operative connection to move with said member as the latter rotates.

2. In a pattern mechanism for looms, a pattern chain controlled lever, a vibrator gear rotatably mounted on said lever, a link rotatably mounted on said lever about a center eccentric with respect to the vibrator gear and a harness connector operatively connected to said gear and link.

3. In a pattern mechanism for looms, a pattern chain controlled lever, harness mechanism, a rotatable member mounted on said lever, and a pair of links, one connected to the lever eccentrically with respect to the rotatable member and the other to said harness mechanism, and a common connection between said links slidably movable in a slot in the rotatable member as said member rotates.

In testimony whereof I have hereunto affixed my signature.

WILLIAM M. vWAITIE 

